Electric switch.



No. 760,815. n *PATENTED MAY 24, 1904.

' 4 J LSTBVENS.-

'ELECTRIC SWITCH. APLICTION HLBDDE. 30, 1903.

N0 MODEL.

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Arran/fer.

IO which form a part thereof.

if UNITED STATES Patented May 24, 1994.

PATENT OFFICE.

ELECTRIC SWITCH.

SPECIFICATION forming part `of* Letters Patent No. 760,815, 'dated' May 24, 1904.

` Application filed December 30, 1903.-r Serial No. 187,129. (No model.)

To all whom itmay'concern:

Be it known that I, FRANK STEVENS, ofthe city and county of Philadelphia, State of Penn-.

Sylvania, have invented an Improvement in Electrlc Swltches, of which the following is .a specification.

My invention has reference to electric switches; and 1t conslsts of certalnimprovementsset out inA the following specification andl shown in the accompanying drawings,

My improvement comprehends mechanical constructions making up the details of the switch structure to insure amost positive and effective cooperation of the parts to constitute lmore especially av two-pole switch, and said mechanism will be better understoodby reference to the drawings,- in which;-

'Figure l is a sectional plan view of my im? proved switch,` taken online 1 1 of Fig. 3. Fig. 2 is a vertical side elevation of the same, taken on line 2 2.0i Fig. 1. Fig. 3 is a transverse sectional Viewof :the Same'on line 3 3 of Fig. 2. Fig. 4 is al perspective'view of Sectional view on line 5V 5 of Fig. 2. Y

- A is a case of porcelain or other non-con-4v one of the contactterminals, 'and Fig.`5 is al ducting'n'iaterial and is'made-box-shaped and closed on the'openr side by the face-plate 'R'. This case has metal plates A secured to its ends, by which it may be secured in position by screws,` as shown in Fig.`2.

B is an arch-shaped frame of metal, secured within theboX-case, and has pivoted to 'it at c the T-shaped plates G. C. i D and D' are-two push or thumb pieces and are guided through aperturesin the faceplatevand hinged, respectively, to the lateral extensions or arms of the plates C C.y The lowerjends of the downwardly-extending legs of the frames C C are connected together by an insulating-block C of vulcanite .ber or other insulating material. .The transverse block C is adaptedto play through the space below the upper part of the frame B. This block is held in place by insulating-washers C2 and flanged studs N N', screwed into the ends of the block and extending over the washers, as shown in Fig. 5. l

. Within the case A are four contact-termin als, and these are widely separated and ar-` l ranged in pairs-namely, I and H and If and supports e directlyin line with the hinge c of the plates C C, as shown in Fig. 2. They are also provided with spring-,catches L, eX- tending through apertures in the body of the terminals. The other twoterminals II are similar in having clamping-screwsM for the terminal wires and thespring-catchesYK, corresponding to the catches L above referred to. These spring-catches are formed of flat metal and extend 'through apertures inthe body lof the terminal plates, as shownv in-Fig. 4. Spring-contact plates lare also'secured yto the -base ofxthese terminals I and vrest against eachother with their entrance edges -flared away from each other, as shown in `Two contact-blades E F are respectively hinged at e and f to the base ends of the ter- `to easily enter-'between the spring-contact i plates J. blades are'notched ftocatch upon the springcatches L and'K, as shown in Fig. 2, and whereby they are held against accidental displacement and` against movement to such anA extent as-to requirea more positive pullA and to Insure a quicker'movement when released, as more fullyV described later on.

Gr` G are -coil-springs which are connected will cause the free `ends 'of the contactblades E F to be quickly snapped over from one side to the other, insuring a quick opening'and closing of the circuits.

The tops ofthe contact-bladesEF are notched,

as at Z, and in these notches the ends of the l minals H H and are sharpened on one edge The upper or free ends ofthese Ioo - spring-catches L K of the terminals snap to retain the blades against accidentalor premalure displacement under the pull of the springs through apertures in the terminal bodies they are guided and held in proper operative position under the hardest usage of the switch.

In the constructionof this switch the terminals have been arranged as Jfar apart as po S-,

sible and the spaces between the operative parts have been made as large as possible to insure good insulation-and protection against short-circuiting.

While I have described my invention as a two-pole switch, it is evident that one set of the terminals and circuit-controlling parts may be used alone to constitute a single-pole switch. Y. f Y Y While I prefer the construction shown, the details may be Amodified without departing from vthe spirit of my invention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In an electric switch, the combination of a case of insulating material, four terminal frames secured to the case and separated from each other, spring retaining-catches secured to the terminal frames, spring-contacts secured to two of theterminal frames, contact-,blades pivoted tothe bases of the lremaining two terminal frames,an arch-frame secured to the case and intermediate of the terminal frames and contactblades,aT-shaped frame pivoted tosaid arch-frame, push parts adapted to respectively operate upon the opposite arms of the T- shaped frame, and aninsulating-spring connection between the free end of each of the contact-blades and the lower end yof the T- shaped frame. Y

2. In an electric switch, the combination of a case of insulating material, four terminal frames secured to the case and separated from each other, spring retaining-catches secured to the terminal frames, spring-contacts secured to two of the terminal frames, contact-blades pivoted to the bases of the remaining two terminal frames,an arch-frame secured to the case' and intermediate of the terminal frames and contact-blades, a T-shaped frame pivoted to saidarch-frame, push parts adapted to respectively operate upon the opposite arms of the T- shaped frame, an insulating-support secured to the end of the T-shaped frame, a spring connection between the free end of each of the contact-blades andthe insulating-support of the lower end of the T-shaped frame.

3. In an electric switch, the combination of a case of insulating material, four terminal frames secured to the case and separated from each other, spring retaining-catches secured to the terminal frames, spring-contacts secured to two of the terminal frames, contact- By having the spring-catches extendl blades pivoted to the bases of the remaining two terminal frames, an arch-frame secured to thc ease and intermediate of the terminal frames and contact-blades, a T-shaped frame pivoted to the said arch-frame and consisting of two frames arranged one on each side of the arch-frame, two push parts respectively hinged between the arms at each side of the pivot, insulating material secured between the lower parts of the two T-shaped frames and extending through the arch-frame, metal pins secured to each end of the insulating material, and spring connections respectively between said pins and the contact-blades.

4:. In an electric switch, a terminal frame consisting of a fiat metal body bent at the bottom to form a foot, and at the top to form a binding-post, combined with two spring-contacts secured to the foot and a spring-catch secured to the body and having its free end extended through a hole in the body and terminating above the spring-contacts. y

5. In an electric switch, a terminal frame consisting of a fiat metal body bent at the bottom to form a foot and a hinge member and at the top to form a binding-post, combined with a spring-catch secured to the body and having its free end extended through it.

6. In an electric switch, a terminal frame consisting of a flat metal body bent at the bottom to form a foot and a hinge member and at the top lto form a binding-post, combined with a spring-catch secured to the body and having its free end extendedthrough it, a contact-blade pivoted to the hinge member and having its upper end adapted to make connection with the spring-catch, and means to move the contact-blade.

IOO

7. In an electric switch, an Operating-frame consisting of two T-shaped frames combined with push parts connected to the opposite horizontal 'arms, an linsulating-block interposed between the free ends of the other legs or arms of the T-shaped frame, and pins secured to the insulating-block, in combination with an arch-shaped supporting-frame arranged between theltwoT-shaped frames and pivoted thereto.

8. In an electric switch, the eolnbination of a pivoted frame consisting of plates C, C, insulating-block C' between them, washers Cl-l of insulating material, pins N, N', screwed into Athe insulating-blocks and clamping the` washers in place, contact-blades, and springs connecting with the contact-blades and also with the pins N, N.

In testimony of which invention I hereunto set my hand.

FRANK STEVENS.

' Witnesses:

ERNEST H owARD HUNTER, R. M. KELLY. 

